Optimizing ZBar QR reader?

[jcarnaggio]

At the moment, I use ZBar with the camera module through the Raspbian terminal by these commands:

Code: Select all

~ $ sudo modprobe bcm2835-v4l2
~ $ v4l2-ctl --overlay=1
~ $ zbarcam -v --nodisplay --prescale=640x480

The range at which I can read a 4 in. by 4 in. QR code is no more than 3.5 ft. and it takes maybe 5 or 6 seconds for ZBar to actually detect and decode it. I know that you can write programs in Python using import zbar but I am wondering what the best way to increase the range and decrease the processing time is.

All ideas and suggestions appreciated.

[tonywaite]

Hi,
Have you overclocked the Pi2?
I'm getting pretty much immediate recognition - albeit at close range - using the following:

gpu_mem=256
force_turbo=1
arm_freq=1100
core_freq=500
sdram_freq=500
over_voltage=6
temp_limit=80
boot_delay=0
disable_splash=1

[jcarnaggio]

...
gpu_mem=256
force_turbo=1
arm_freq=1100
core_freq=500
sdram_freq=500
over_voltage=6
temp_limit=80
boot_delay=0
disable_splash=1

This actually worked wonders, thank you so much.